Reading the book doesn't justify anything. Books can go into so much more detail than a TV series. Books can actually delve into the mind of the individual who is feeling all the emotions so the reader can get a better understanding of them. A lot of the people watching haven't read the book. And all they are seeing is Hannah blaming Justin for a rape that she could've stopped and rejecting help she got.
If we want to raise awareness about suicide, particularly male suicide maybe we should remind feminists what the word "feminism" actually means